Adjustable caster.



A. l. DOHERTY, Jn. ADJUSTABLE CASTER.

APPLICATION man APR. 1o. 1916.

1, 1 85,886. Patnted June 6, 1916.

Af/089W, w37 m M Strom@ ALFRED JAMES DOHERTY, JR., OF MACKINAC ISLAND, MICHIGAN.

ADJUSTABLE CASTER.

Specification of Letters Patent.

Application filed April 10, 1916,

To all whom z't may concern Be it known that l, Amman J. Domain', Jr., a citizen of the United States of America, residing at Maekinae lsland. in the county of Mackinac and Sta-te of Uiehigan. have invented new and useful Improvements-'in Adjustable Casters. of whieh the following is a specification.

The present invention relates to in'iprovements in adjustable. easters` and is designed parti.. `darly for use in eonneetion with eertain pieces of furniture.

The primary objeet of the. invention is the provision of adjustable means for use in Connection with furniture sueh as phonograph cabinets. desks. tables. ete.. by whieh the piece of furniture may be adjusted to level position, and particularly in the rase 0f plrOnOgraph cabinets. the eabinet may be adjusted so that when the motor is wound. the cabinet remains stable or rigid.

In utilizing my invention. the pieee of furniture is equipped with the adjustable casters b v applying them to eaeh of the supporting legs or pedestal of the furniture. and inasnmeh as eaeh easter is adjustable independently of the others. it will readily be seen that the pieee ot' furniture may be positioned to rest upon a tloor. and be adjusted to the irreguharities in the flooring. so that the artiele will stand without Shaking or vibrating.

The invention eonsists in eertain novel combinations and arrangenu-nts ol' parts l'or attaching' the easter to the legl ol' the pieee of furniturel as will be hereinafter more fully deseribed and elaimed.

ln the aeeompanying drawings l have illustrated one eomplete example olI the physieal embodiment of my invention eoustrueted aeeording tothe best mode l ha ve so far devised for the praetieal applieation of the principles of my invention.

Figure l is a side elevation of a easter eonstrueted aeeording to illy invention and shown as applied to the lower end oll a leg of a pieee of furniture. Fig. is a view seen from the right in l"ig. l. showing parts ofthe invention in seetion, and also the leg. Fig. It is a top plan view ol' the adjustable easter. 1Fig. Yl is a side elevation of the soeket member detaehed. l".ig. 5 is a side elevation ot the adjustingr serew member. detached.

ln the preferred embodiment? of my invention. I have illustrated the roller l and Patented June 6, 1916.

Serial No. 90,149.

itsl braeket 'l as of usual construction, and the stem il has a rivet head 3 in the bracket 2. while its upper end 3 may be riveted or headed as illustrated to hold the stem in the hollow serew sleeve 4. This sleeve with its external threads and hollow bore, is formed with a hollow cap 5 which is circular in eross seetion and knurled on its exterior so that it may be grasped by the fingers and thumb to be turned. The usual antifriction rollers t' and supporting.r members T and 8 are inelosed within the hollow cap 5. and

supported on the stem 3, and the antifriction rollers or disks ti revolve it around in a cir ele on the upper edge of the bracket 2 aS usual. These parts are all loose with relation to eaeh other. so that the threaded sleeve l. the two members T and S. and the stem It are all supported on the braeket head 2. but they are all free to revolve with relation to the bnieket with the stein as a eenter. and the stem itself is loose in the bracket and threaded sleeve t.

lhe portion of the adjustable easter which is ixed to the pieee of furniture. comprises a barrel or soeket El. whieh is internally serew threaded. and provided with an enlarged head l0. whieh is preferably of frusto eouieal form to give a finished appear.inee to the lowe'r end of the leg of the pieee of furniture to whieh it is attaehed. 'l`his head is provided with a series of upwardly projeeting prongs l2 whieh may be driven into the material of the legr 13, and the leg itself is bored out to form a socket to reeeive the barrel tl. By means of the prongs lL. the barrel il is seenrely fixed t0 the lower end ol' the leg ll. and then the threaded sleeve t is entered and screwed into the barrel il. Thus. in order to adjust a desk on an iiregular fioor. if the roller 1 does not toueh the floor, the threaded sleeve l may be serewed out of the barrel 9 until the roller l is brought down in eontaet with the lloor. ln this manner. if a table with four legs has three legs resting on the Hoor,

amv e other leg due to an irregularity in the or is not touelnng the tloor. the adjustable easter luay be manipulated so that the fourth leg will perform its proper funetious in supportingr the table. and when thus supported at its four points. the table remains rigid and stable.

'l`his deviee is partirularly applicable for use in eonneetion with eahinets for sound reprodueinlgr machines o r other instruments` of precision where it is necessary that the body to be supported shall be steady and stable and insured against tilting or shaking,

vWhat I claim is:

The combination with a furniture leg having a socket of a barrel provided with internal threads, and means for fastening the barrel to said leg, a roller and its supporting bracket, a rotatable sleeve having exterior threads engaging the interior threads of the barrel, a stem securing the bracketl and sleeve together, a hollow cap on the sleeve, and antifriction bearings between said cap and the bracket.

In testimony whereof Ialix my signa,- ture.

ALFRED JAMES DOHERTY, JR. 

